lib9/main.c: don't show the crash dialog on windows Fixes issue 3202. (Or rather, work around issue 3202)
lib9/main.c: don't show the crash dialog on windows
Fixes issue 3202. (Or rather, work around issue 3202)

R=alex.brainman, rsc
CC=golang-dev
https://codereview.appspot.com/7202053

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang